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OpenStudy (anonymous):
x+3y+8 -x+2y=-3
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OpenStudy (jlastino):
5y=-11 y=-11/5
OpenStudy (anonymous):
thank you
OpenStudy (anonymous):
-6x-y=-20 6x-y=28
OpenStudy (jlastino):
-6x-y=-20 y=-6x+20 sub this into the other equation 6x-(-6x+20)=28 6x+6x-20=28 12x=48 x=4
OpenStudy (anonymous):
-x-9y=12 -4x+9y=3
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OpenStudy (jlastino):
-x-9y=12 x=-9y-12 -4(-9y-12)+9y=3 36y+48+9y=3 45y=45 y=1 -x-9(1)=12 -x-9=12 x=-9-12 x=-21
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